■ Abstract Measurements of cosmogenic nuclides, predominately 10Be, allow new insights into the ways in which and the rates at which sediment is generated, transported, and deposited over timescales ranging from 103 to 106 years. Samples from rock exposures are used to estimate erosion rates at points on the landscape, whereas samples of fluvial sediment provide estimates of basin-scale rates o...

The study of geotechnical index properties soils in Oworoshoki, Kosofe, Lagos State was conducted to characterize and classify the soil samples. Disturbed undisturbed were collected at different shallow depths (1m, 2m 3m) from area laboratory test conducted. includes natural moisture content, atterberg limits (liquid limit plastic limit), particle size distribution, specific gravity, unit weigh...

Simple methods of analysis are developed for computing the dynamic steady-state axial response of floating pile groups embedded in homogeneous and non-homogeneous soil deposits. Physically-motivated approximations are introduced to account for the interaction between two individual piles. It is found that such an interaction arises chiefly from the ‘interference’ of wave fields originating alon...

Bacteria and archaea sustain subsurface cave ecosystems by dominating primary production and fueling biogeochemical cyclings, despite the permanent darkness and shortage of nutrients. However, the heterogeneity and underlying mechanism of microbial diversity in caves, in particular those well connect to surface environment are largely unexplored. In this study, we examined the bacterial abundan...

A micropaleontological study has been carried out on the samples collected from the Sarv Abad section, the oldest and only known Jurassic sedimentary rocks cropping out in the Moghan area. Studied sequence consists of carbonates bounded at both base and top by clastic deposits. Studied carbonate deposits provide an assemblage of benthic foraminifera as well as calcareous algae. The stratigraphi...

Joints and fractures, common in Ohio glacial tills, often influence shallow ground water flow paths and rates. Environmental site investigations in glacial till and lacustrine sediments should include determination of the glacial stratigraphy and evaluation of the presence, extent, and density of subsurface fractures. The test pit is one approach to directly assess fracturing and stratigraphy. ...

We employed a Mohr-Coulomb safety factor equation to assess the response of ice-cemented slopes in the stable upland zone of the McMurdo Dry Valleys (MDV) to artificial increases in mean summertime soil surface temperatures (MSSST). Results show that ice-rich, silty tills on slopes 20° could fail by planar sliding with an increase in MSSST of ~5o to 9oC. This change corresponds to an atmospheri...

The hydrology of alpine and subalpine areas in the Colorado Front Range (USA) is evolving, driven by warming alteration precipitation patterns, timing snowmelt, other components hydrologic budget. Field measurements soil hydraulic conductivity moisture along 30-m transects (n = 13) representative soils developed surficial deposits falling head slug tests shallow groundwater till demonstrate tha...